Apparatus for grain-drying and coffee-roasting



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l W; W. DUNN. APPARATUS PoR GRAINADRYING AND eoFPBE-ROASTING.

No. 284,728, Patented Sept. 11, 1883.

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W. W'. DUNN. APPARATUS POR GRAIN DRYING AND COFFEE ROASTING. No. 284,728. Patented sept. 11, 188s. l

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W.- W. DUNN. APPARATUS FOR GRAIN DRYING AND COFFEE ROASTING. N0. 284,728..

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ATTORNEYS www@ www atented Sept. 11, 1883.

WITNESSES I miren STATES,

PATENT OFFICE..

VILLIAM W'. DUNN, OF FORT VORTH, TEXAS.

APPARATUS FOR GRAIN-DRYING ANKD COFFEE-ROASTING- SPECIFICATION forming part of Letters Patent No. 284,728, dated September 11, 1883.

Application filed February 9, 1883. (No model.) Y

To @ZZ whom t may concern.:

Be it known that l, WILLIAM WASHINGTON DUNN, a citizen of the United States, residing at Fort Worth, in the county of Tarrant and State of Texas, have invented certain new and useful Improvements in Grain-Drying and Coffee-Roasting Apparatus, of which the following is a full, clear', and exact description.

The object of my invention is to construct an apparatus in which grain or fruit may be dried, coffee roasted, and the water evaporated from sugar and other like products.

My invention consists in the hereinafter-described means of attaining said object. v

In the drawings, Figure l represents a front elevation of my improved apparatus, with parts broken away to show the construction; Fig. 2, a side elevation of the same; Figs. 3, 8, and 3b, detail views of the retarders; Figs. 4 and 4f, detail views of the coffee-roaster; Fig. 5, other details of construction. Fig. 6 is a broken elevation, showing the coffee-parchers and their actuating mechanism. Fig. 7 is a detailtop view of the parching apparatus and the hopper.

Similar letters of reference indicate corresp ondin g parts throughout the different views.

Arepresents the casing of the heating-chainber, and extends through the different stories of the factory in which said apparatus is erected. Situated at the lower end of said casing is the furnace B, said furnace being provided with doors b. Extending vertically upward from top of said furnace are the smoke and .heat pipes C, said pipes passing through the angular discharging-plate D and upward to the top of the apparatus, where they connect withy the smoke stack orvents E. At intervals along the interior of the heating-chamber are .sand-boxes F, by which the heat is more 'leifectually retained within said chamber. On the outside of the casing A, above each sandbox, are situated water-tanks G, said tanks connected with interior of the chamber by pipes g, having cocks g and g2 and openings g for the introduction of water. Situated in the spaces between the pipes C are the retarders I-I. The retarders are A-shaped in crosssection, provided with cross-pieces h', and are connected by loose `joints with rods Zz., said rods having their lower ends secured to the 4upper parts or ridges of the retarders, and

chamber. 'ing-hopper I, provided at its lower end with cross-pieces h', thus allowing the retarders ay horizontal swinging movement as the grain falls upon them. The retarders of each alternatevertical row lie in similar vertical planes; but in adjoining rows they are on different horizontal planes. These retarders extend from the bottom to near the top of the heating- Above the retarders is the receivfeed-pipes The latter may be closed by a valve, i', connected with the lower part of the apparatus by an elbow-lever, t2, and handrod t3.

When it is desired to parch coffee, the retarders are removed from the drying-chamber and the removable pipes K arel inserted in their stead. Said pipes K have perforated sides, and are supported by brackets It, a tached to the pipes C. Within each of said pipes are U-shaped rods k, supported on rests Thetops of said rods are securedfto and said rods are rotated by pinions k3, and the latter are actuated in the manner hereinafter described. Near the bottom of each pipe is the cut-off slide kt, by means of which the escape of the coffee from the pipes may be retarded or altogether stopped. Said pipes, rods, and pinions are removable from the heating-chamber.

The casingA is provided at different eleva-y tions with doors a, by which the operator is enabled to effect entrance to the interior Iof the heating-chamber for various purposes. At one side of casing A is a second casing, L,

containing the elevator L of the apparatus.

Said elevator consists of al series of buckets attached to an endless band, said band passing over and under drums situated in the upper and lower parts of the casing L. The axle of the lower drum is provided (on the outside of the casing) with a tooth-wheel, Z, and this wheel is revolved by a chain passing around it and another similar wheel, Z, attached to the driving-shaft of the apparatus. Another chain connects said driving-wheel Z with a wheel, Z2, journaled in the casing A, the shaft of which bears upon its inner end a bevel-pinion, Z3, the latter gearing with a like pinion, Z*, which is borne by a shaft, Z5, having bearings secured to the interior of the casing. Upon the upper extremity of said shaft Z is a wheel, l, gearing are connected by a chute-pipe, M, by which the article to be operated upon is passed from the elevator to the hopper. Connected with the discharging-plate I), near the bottom of casing A, is a discharge-spout, n, which passes through the elevator-casing and opens upon the outside of same. Said spout is constructed in two sections, as fully described in my former patent, No. 266,790, of October 31, 1882, and empties either within or outside of the elevator. Situated upon another side of the casing A is a third casing, Q, through which heatpipes I), connected with the fur-nace, run and connect at their upper ends with the aforesaid smoke-stack.

Arranged at intervals through the casing Q are horizontal shelves q, upon which fruit is placed to be dried. These shelves are lsupported on brackets (j, secured to the interior of the casing. Doors q2 are constructed in said casing for the introduction of the dryingshelves and fruit.

For purposes of economy and convenience the building in which the apparatus is erected may be heated at any desired time by pipes R, opening in the casing A, just above the sandboxes. Said pipes may conduct the warm air from said easing to the various apartments, and the hot air may be moistened bywater dropped from tanks upon the sand in the boxes.

The operationof my invention is as follows: A re is kindled in the furnace B, and grain or other articles are introduced into the lower part of the elevator through a feed-box similar to that described in my former patent. Simultaneously with this introduction the driving-shaft is rotated, .and the elevator carries said articles upward and empties them into the receiving-hopper. From thence they are fed to the drying-chamber with greater or less rapidity, as the cut-oil' slide of the hopperopening is more or less withdrawn; From the hopper said grain passes into the pipes K, where it is agitated by the rotary rods, and from thence it falls upon the retarders. (Of course if the pipes and rods are removed this part of the operation is omitted.) The grain then falls from one retarder to another until it reaches the discharge-plate of the apparatus. From thence it is conducted through the discharge-pipe, either back into the elevator (in case it is not sufficiently dried or parched) or through the elevator into a receptacle placed on ,the`outside of the apparatus. At the same time with the above operation fruit may be dried in the casing O by placing it upon the shelves therein contained.

Having thus described my invention, what I claim is- 1 l. In an apparatus for drying and parching grain and coifee, the combination of the .retarders H, provided with cross-pieces 71,',

and the rods h, having their lower ends secured to the tops of the retarders and their y upper ends hooked over the cross-pieces hf, substantially as and for the purposes described.

2. In a grain-drying and coffee-roasting apparatus, the combination of the perforated -pipes K and U-shaped rods k, rests k, connected to the vertical heating-pipes within the casing, and pinions It, the latter connected with the driving-shaft in the manner and ,i for the purposes described.

The combination, in a grain-drying and coffee-roastingapparatus, of the bracket-rest ki', secured to pipes C within the casing, the removable pipes K, provided with perforations in their sides, and the cut-off slides k, substantially as described, whereby the article parched is held and discharged, for the Witnesses SAM FUsMAN, H. P. HARRTsoN. 

